987578843 has 2 divisors, whose sum is σ = 987578844. Its totient is φ = 987578842.

The previous prime is 987578819. The next prime is 987578857. The reversal of 987578843 is 348875789.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 987578843 - 2⁸ = 987578587 is a prime.

It is a super-2 number, since 2×987578843² = 1950623942282437298, which contains 22 as substring.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493789421 + 493789422.

It is an arithmetic number, because the mean of its divisors is an integer number (493789422).

Almost surely, 2^987578843 is an apocalyptic number.

987578843 is a deficient number, since it is larger than the sum of its proper divisors (1).

987578843 is an equidigital number, since it uses as much as digits as its factorization.

987578843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 59.

The square root of 987578843 is about 31425.7671823617. The cubic root of 987578843 is about 995.8423522550.

The spelling of 987578843 in words is "nine hundred eighty-seven million, five hundred seventy-eight thousand, eight hundred forty-three".